Energy-saving integrated ultrafiltration water purification system

Abstract

The utility model discloses an energy -saving integrated type ultrafiltration water purification system, include: membrane pool, be equipped with ultrafiltration membrane group ware and membrane pool liquid level gauge in the membrane pool, the membrane pool is linked with water supply system and sludge discharge system, ultrafiltration membrane group ware links with aeration system, water production system and backwashing system respectively, membrane pool, water supply system, water production system and backwashing system are connected with dosing system respectively. Have strong anti -pollution ability, long life, water quality is excellent, promote system shock resistance, guarantee system stable operation and water quality, convenient transportation, can fast response, delivery time is short, degree of automation is high, system automatic control, need not manpower frequent operation, maintenance is convenient, can realize remote monitoring operation condition, system operation cost is low, improve the anti -pollution performance of membrane, the frequency of chemical cleaning process greatly reduces, reduce the operation energy consumption of pump, the advantage of comprehensive reduction system operation cost.

Description

Technical Field

[0001] This utility model relates to the technical field of surface water treatment systems, and more specifically, to an energy-saving integrated ultrafiltration water purification system. Background Technology

[0002] Currently, safe drinking water is a basic human need. Current drinking water treatment processes still pose risks of biological leakage, micro-pollutants, and heavy metal contamination. At least 2 billion people worldwide use drinking water with biosafety risks. Approximately two-thirds of China's 600 large and medium-sized cities face water shortages, and the city's wastewater discharge is growing at a rate of 5%, ranking first globally. The water treatment market has a capacity of 70 billion tons. The new standard GB5749-2022, "Standards for Drinking Water Quality," is a Chinese national standard implemented on April 1, 2023. Although the total number of indicators is less than the "Standards for Drinking Water Quality" (GB5749-2006), the requirements are higher. The new standard pays more attention to sensory indicators, disinfection byproducts, risk changes, and raises the limits for some indicators. However, when water needs to be used due to limitations, appropriate purification processes should be used, and the treated water quality should meet the requirements of this standard.

[0003] Meanwhile, water supply systems in most rural towns and some remote mountainous areas of my country suffer from outdated technology and aging facilities. Especially during the rainy season, water turbidity increases, and when the raw water turbidity is lower or higher than the designed treatment capacity, the effluent quality fails to meet standards. The treated water systems struggle to meet the new drinking water hygiene standards, exacerbating drinking water safety issues in rural areas. There is an urgent need for a convenient, highly integrated, compact, high-quality effluent system with low chemical consumption and high energy efficiency, allowing traditional high-energy- and high-material-consumption water treatment methods to become obsolete.

[0004] In the prior art, patent CN218810786U discloses an integrated water purification system, including a raw water inlet main pipe, a water storage module, and a purified water outlet pipe. The water storage module is equipped with several membrane modules, which are connected to the purified water outlet pipe via a water production valve and a purified water pump. The purified water outlet pipe is also connected to an ejector, which is connected to an ozone generator and a gas receiving tank. The gas receiving tank is connected to several membrane modules via a backwash pipe, on which a backwash valve is installed. The ejector of this patent can mix purified water from the purified water outlet pipe with ozone from the ozone generator to form pressurized dissolved air water, and carry the pressurized dissolved air water into the gas receiving tank. The gas receiving tank depressurizes and dissipates the energy of the pressurized dissolved air water to form micro-nano bubbles, thereby achieving backwashing of the membrane modules. This patent is applicable to treating water with low turbidity. The micro-nano aeration during backwashing alone has a poor scrubbing effect on the membrane. When the turbidity of the incoming water fluctuates greatly, the production water volume cannot be guaranteed.

[0005] In summary, at least one of the following technical problems exists:

[0006] Existing surface water treatment systems have poor shock resistance, high energy consumption, and difficulty in guaranteeing the quality of effluent. Utility Model Content

[0007] The main purpose of this utility model is to provide an energy-saving integrated ultrafiltration water purification system to solve the technical problems of existing surface water treatment systems, such as poor shock resistance, high energy consumption, and difficulty in guaranteeing the quality of effluent.

[0008] To achieve the above objectives, according to one aspect of the present invention, an energy-saving integrated ultrafiltration water purification system is provided, comprising:

[0009] Preferably, the water supply system includes a system inlet pump, which is connected to an electromagnetic flow meter in the inlet pipeline. The electromagnetic flow meter in the inlet pipeline is connected to an online turbidity meter, which is connected to a coagulant dosing pipeline mixer. The coagulant dosing pipeline mixer is connected to an automatic valve in the system inlet pipeline, and the automatic valve in the system inlet pipeline is connected to a membrane tank.

[0010] Preferably, the water production system includes a first manual valve, one end of which is connected to an ultrafiltration membrane module, and the other end is connected to a sixth automatic valve. The sixth automatic valve is connected to a water production pump. The water production pump, the sixth automatic valve, and the first automatic valve are connected in parallel. The water production pump is connected to a diaphragm valve. The water production diaphragm valve is connected to a first electromagnetic flow meter. The first electromagnetic flow meter is connected to a first pipeline mixer. The first pipeline mixer is connected to a second automatic valve. The second automatic valve is connected to a water production tank. The water production tank is equipped with a water production tank level gauge.

[0011] Preferably, the backwashing system includes a third automatic valve, one end of which is connected to the product water system and the other end of which is connected to the backwash water tank. The backwash water tank is equipped with a first level gauge. The backwash water tank is connected to a backwash pump. The backwash pump is connected to a second electromagnetic flow meter. The second electromagnetic flow meter is connected to a second pipeline mixer. The second pipeline mixer is connected to a fourth automatic valve. The fourth automatic valve is connected to a pressure transmitter. The pressure transmitter is connected to a first manual valve. The first manual valve is connected to an ultrafiltration membrane module.

[0012] Preferably, the aeration system includes a blower, which is connected to a shut-off valve. The shut-off valve is connected to a third manual valve and a fourth manual valve, respectively, and the third manual valve and the fourth manual valve are connected in parallel.

[0013] Preferably, the dosing system includes a first dosing metering pump, a second dosing metering pump, and a third dosing metering pump. One end of the first dosing metering pump is connected to a second pipeline mixer, and the other end is connected to a first dosing storage tank. One end of the third dosing metering pump is connected to a coagulant dosing pipeline mixer, and the other end is connected to a second dosing storage tank. One end of the second dosing metering pump is connected to a membrane tank, and the other end is connected to the first dosing storage tank. A second level gauge is provided on the first dosing storage tank.

[0014] Preferably, the sludge discharge system is connected to a sludge discharge pipe at the bottom of the membrane tank, and the sludge discharge pipe discharges sludge periodically through a seventh automatic valve.

[0015] Preferably, the third manual valve is connected to the micro-nano aeration device, the micro-nano aeration device is also connected to the second manual valve, the second manual valve is connected to the ultrafiltration membrane module, the second manual valve is connected in parallel with the third and fourth manual valves, the micro-nano aeration device is connected to the fifth automatic valve, and the fifth automatic valve is connected to the water supply system.

[0016] Preferably, the lower end of the membrane tank is connected to a diaphragm valve, the diaphragm valve is connected to a circulating cleaning pump, and the circulating cleaning pump is connected to a product water system.

[0017] Preferably, it also includes a disinfectant solution storage tank, which is equipped with a drug storage tank level gauge, and the disinfectant solution storage tank is connected to the first pipeline mixer through a dosing device.

[0018] The application of the technical solution of this utility model has the following technical effects:

[0019] (1) This utility model adopts the mainstream process of ultrafiltration + sodium hypochlorite disinfection, supplemented by coagulation sedimentation and micro-nano aeration system. The ultrafiltration membrane is a hollow fiber membrane, which has the characteristics of strong anti-fouling ability, long service life and excellent effluent quality. The system has multiple modules that automatically switch according to the influent conditions, which improves the system's shock resistance and ensures stable system operation and product water quality.

[0020] (2) The equipment in the system is highly integrated and occupies a small area. The energy-saving water purification equipment provided by this utility model is highly integrated inside the container, which is convenient to transport, can respond quickly, and has a short delivery time.

[0021] (3) High degree of automation, automatic system control, no need for frequent manual operation, convenient maintenance, and remote monitoring of operation status;

[0022] (4) Low system operating cost. This utility model provides an energy-saving integrated ultrafiltration water purification system. The system operation is combined with low-volume micro-nano aeration equipment, which improves the membrane's anti-fouling performance and greatly reduces the frequency of chemical cleaning processes. In addition, the siphon water production mode reduces the pump's operating energy consumption without affecting normal water production, thus comprehensively reducing the system's operating cost. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of the energy-saving integrated ultrafiltration water purification system according to the present invention is shown.

[0025] The above figures include the following reference numerals:

[0026] 1-System inlet pump, 2-Inlet pipeline electromagnetic flow meter, 3-Coagulant dosing pipeline mixer, 4-System inlet pipeline automatic valve, 5-Ultrafiltration membrane module, 6-Membrane tank, 7-Membrane tank level gauge, 8-Sixth / Seventh automatic valve, 9-First automatic valve, 10-Permeate pump, 11-Permeate diaphragm valve, 12-First electromagnetic flow meter, 13-Disinfectant solution storage tank, 14-Disinfectant storage tank level gauge, 15-First pipeline mixer, 16-Second automatic valve, 17-Permeate tank, 18-Permeate tank level gauge, 19-Third automatic valve, 20-Backwash water tank, 21-First level gauge, 22- 23-Backwash pump, 24-Second electromagnetic flow meter, 25-Second pipeline mixer, 26-First dosing tank, 27-Second level gauge, 28-First dosing metering pump, 29-Fourth automatic valve, 30-Pressure transmitter, 31-Second dosing metering pump, 32-Circulating cleaning pump, 33-Diaphragm valve, 34-First manual valve, 35-Fifth automatic valve, 36-Micro-nano aeration equipment, 37-Second manual valve, 38-Blower, 39-Stop valve, 40-Fourth manual valve, 41-Online turbidity meter, 42-Second dosing tank, 43-Third dosing metering pump. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1As shown in the figure, this utility model embodiment provides an energy-saving integrated ultrafiltration water purification system, including: a membrane tank 6, wherein an ultrafiltration membrane module 5 and a membrane tank level gauge 7 are provided in the membrane tank 6, the membrane tank 6 is connected to a water supply system and a sludge discharge system, the ultrafiltration membrane module 5 is connected to an aeration system, a product water system and a backwashing system respectively, and a dosing system is connected to the membrane tank 6, the water supply system, the product water system and the backwashing system respectively.

[0029] All the equipment in this utility model is integrated inside a container, including an integrated ultrafiltration membrane module 5, a water supply system, a product water system, a backwashing system, an aeration system, a dosing system, and a sludge removal system. The ultrafiltration membrane module 5 is placed in a membrane tank 6, and the module is connected to the aeration pipeline and the product water pipeline. The membrane tank 6 is connected to the inlet water system pipeline and the bottom sludge removal pipeline. A membrane tank level gauge 7 is installed in the membrane tank 6. The water supply system is sequentially connected to the system inlet water pump 1, the inlet water pipeline electromagnetic flow meter 2, the online turbidity meter 41, the coagulant dosing pipeline mixer 3, and the system inlet water pipeline automatic valve. Door 4, and the water supply system is connected to the submerged ultrafiltration membrane tank 6 via pipeline after the inlet valve; the product water system pipeline is sequentially connected to the first manual valve 33, the sixth automatic valve 8, the product water pump 10, the first automatic valve 9, the product water diaphragm valve 11, the first electromagnetic flowmeter 12, the first pipeline mixer 15, the second product water automatic valve 16, and the product water tank 17; the backwash system is sequentially connected to the third automatic valve 19, the backwash pump 22, the second electromagnetic flowmeter 23, the second pipeline mixer 24, the fourth automatic valve 28, and the pressure transmitter 29. The aeration system uses a blower 37 to supply air, a shut-off valve 38 to regulate the air volume, and the third manual valve 39 and the fourth manual valve 40 to switch the air supply pipeline to achieve different aeration modes. The aeration pipeline is connected to the air inlet pipe at the membrane module end.

[0030] In this embodiment, the dosing system includes a third dosing pump 43 for coagulant dosing, a first dosing pump 27 for chemical cleaning agent dosing, and a disinfectant dosing pump at the product water end. The dosing pumps dispense chemicals into the pipe mixers on the pipelines. The sludge removal system connects to a sludge removal pipe at the bottom of the membrane tank 6 and periodically removes sludge via a seventh automatic valve 8. Water supply is divided into two inlet modes, adjusted according to the turbidity level displayed on the online turbidity meter 41. The two water supply modes are direct water supply and water supply via micro-nano aeration equipment 35. The water supply mode is automatically adjusted based on the value displayed on the online turbidity meter 41, and the inlet water direction is switched via automatic valves 4 and 34 on the control system inlet pipeline. The gas direction is switched via manual valves 39 and 40, ultimately connecting to the aeration pipeline of the ultrafiltration membrane module 5.

[0031] In this embodiment, the water production system has two production modes, which are adjusted according to the turbidity displayed by the online turbidity meter 41. The two production modes are a pump-suction mode and a siphon mode, which can be switched by adjusting the sixth automatic valve 8, the first automatic valve 9, and the pump 10. Backwash water is replenished through the production end, and the production and backwash water tank 20 replenishment modes can be automatically switched by the second automatic valve 16 and the third automatic valve 19. Coagulant, disinfectant, and chemical cleaning agents are all added via pipelines, with a pipeline mixer ensuring thorough mixing. The chemical cleaning system includes maintenance cleaning and restorative cleaning methods, both sharing a single dosing tank. Chemical cleaning agents are added to the pipeline mixer on the backwash pipeline during the backwash process, directly entering the membrane module. The restorative cleaning method involves adding a certain amount of chemical cleaning agent to the membrane tank 6 via the second metering pump 30, controlling the circulating cleaning pump 31 to achieve the circulating cleaning process.

[0032] In this embodiment, the water supply system includes a system inlet pump 1, which is connected to an electromagnetic flow meter 2 in the inlet pipeline. The electromagnetic flow meter 2 in the inlet pipeline is connected to an online turbidity meter 41, which is connected to a coagulant dosing pipeline mixer 3. The coagulant dosing pipeline mixer 3 is connected to an automatic valve 4 in the system inlet pipeline, which is connected to a membrane tank 6. The water production system includes a first manual valve 33, one end of which is connected to the ultrafiltration membrane module 5, and the other end is connected to a sixth automatic valve 8. The sixth automatic valve 8 is connected to the water production pump 10. The water production pump 10, the sixth automatic valve 8, and the first automatic valve 9 are connected in parallel. The water production pump 10 is connected to a diaphragm valve 32. The water production diaphragm valve 11 is connected to a first electromagnetic flowmeter 12. The first electromagnetic flowmeter 12 is connected to a first pipeline mixer 15. The first pipeline mixer 15 is connected to a second automatic valve 16. The second automatic valve 16 is connected to a water production tank 17. The water production tank 17 is equipped with a water production tank level gauge 18. The backwashing system includes a third automatic valve 19, one end of which is connected to the product water system, and the other end is connected to a backwash water tank 20. The backwash water tank 20 is equipped with a first level gauge 21. The backwash water tank 20 is connected to a backwash pump 22, which is connected to a second electromagnetic flowmeter 23. The second electromagnetic flowmeter 23 is connected to a second pipeline mixer 24, which is connected to a fourth automatic valve 28. The fourth automatic valve 28 is connected to a pressure transmitter 29, which is connected to a first manual valve 33. The first manual valve 33 is connected to an ultrafiltration membrane module 5. The aeration system includes a blower 37, which is connected to a shut-off valve 38. The shut-off valve 38 is connected to a third manual valve 39 and a fourth manual valve 40, respectively, and the third manual valve 39 and the fourth manual valve 40 are connected in parallel. The dosing system includes a first dosing metering pump 27, a second dosing metering pump 30, and a third dosing metering pump 43. One end of the first dosing metering pump 27 is connected to a second pipeline mixer 24, and the other end is connected to a first dosing storage tank 25. One end of the third dosing metering pump 43 is connected to a coagulant dosing pipeline mixer 3, and the other end is connected to a second dosing storage tank 42. One end of the second dosing metering pump 30 is connected to a membrane tank 6, and the other end is connected to the first dosing storage tank 25. A second level gauge 26 is installed on the first dosing storage tank 25. A sludge removal system is connected to a sludge removal pipe at the bottom of the membrane tank 6. The sludge removal pipe periodically removes sludge through a seventh automatic valve 8. The third manual valve 39 is connected to the micro-nano aeration device 35, which is also connected to the second manual valve 36. The second manual valve 36 is connected to the ultrafiltration membrane module 5. The second manual valve 36 is connected in parallel with the third manual valve 39 and the fourth manual valve 40. The micro-nano aeration device 35 is connected to the fifth automatic valve 34, which is connected to the water supply system.The lower end of the membrane tank 6 is connected to the diaphragm valve 32, which is connected to the circulating cleaning pump 31, which is connected to the product water system. It also includes a disinfectant solution storage tank 13, which is equipped with a drug storage tank level gauge 14. The disinfectant solution storage tank 13 is connected to the first pipeline mixer 15 via a dosing device.

[0033] In this embodiment, the system completes the water production process and one backwashing process within one operating cycle. A sludge discharge port is designed at the bottom of membrane tank 6. The chemical dosing system is divided into three parts: coagulant dosing at the water supply end, ultrafiltration membrane restorative cleaning dosing, backwashing maintenance cleaning dosing, and product water disinfection dosing. These functions respectively improve the system's shock resistance and antifouling performance, ensuring effluent quality and system product water volume. The aeration system is designed with two modes: micro-nano aeration and ordinary tubular aeration. These two modes can be switched to reduce system operating energy consumption and membrane fouling. The product water system has two modes: pump-suction product water and siphon-suction product water. Automatic switching is achieved based on the turbidity of the incoming water to ensure the quality and quantity of system product water. The system is highly automated and meets multiple operating modes. This utility model provides an energy-saving integrated water purification equipment that integrates filtration, chemical dosing, sludge discharge, and backwashing functions. The system's PLC automatic control system can comprehensively monitor and alarm key system parameters, resulting in a high degree of system automation.

[0034] In this embodiment, the main water supply system is connected to a coagulant dosing pipeline, which includes a second dosing tank 42 and a third dosing metering pump 43. The dosing pipeline is connected to a pipe mixer on the main water supply system. When the incoming water turbidity is high, automatic coagulant dosing is activated to ensure effluent quality and flow rate. The water supply system has two inlet methods. When the incoming water turbidity is low, a branch pipeline after the inlet pump is directly connected to a micro-nano aeration device 35, which is equipped with an automatic valve. One end of the micro-nano aeration device 35 is connected to the inlet pump, and the other end is connected to a blower 37. Low-volume air intake is sufficient, and the effluent is water containing micro-nano bubbles. The effluent pipeline is designed with a valve to control its opening. The effluent pipeline connects to the aeration pipe at the bottom of the membrane tank 6. When the incoming water has low turbidity, the micro-nano aeration device 35 is activated, and the air and water mix before entering the membrane tank 6. Only one backwash is required per cycle, improving the membrane's anti-fouling performance and reducing system energy consumption. Micro- and nanobubbles have several effects on membrane filaments. First, they exert a certain shear force. Micro- and nanobubbles are characterized by their small size, large specific surface area, and slow rise velocity, resulting in a long residence time in water. When bubbles form and burst near the membrane surface, they generate minute shear forces that help to peel off or loosen contaminants (such as colloids, organic matter, and microorganisms) attached to the membrane filament surface, thereby slowing down the accumulation of membrane fouling. Second, they enhance gas-liquid interface mass transfer. Micro- and nanobubbles have extremely high specific surface areas, which can significantly enhance the mass transfer efficiency at the gas-liquid interface, promoting the transfer of dissolved oxygen and the oxidative degradation of contaminants (such as organic matter). This helps reduce the deposition of organic contaminants on the membrane surface, lowers the risk of biofilm formation, and thus improves the membrane's antifouling ability. Third, they improve mixing and flow regime. The tiny eddies and disturbances formed by micro- and nanobubbles in the water can improve the flow regime within the membrane tank, enhance local mixing, and reduce concentration polarization. Concentration polarization is one of the important factors leading to the aggravation of membrane fouling. Improving the flow regime can slow down this process, thereby improving the membrane's antifouling performance. Fourthly, it serves as an auxiliary physical cleaning method. The continuous generation and rupture of micro-nano bubbles near the membrane surface can act as an auxiliary means of "physical cleaning," forming a synergistic effect with traditional physical cleaning methods (such as backwashing and air scrubbing) to further reduce the membrane fouling rate and extend the cleaning cycle. The aeration system includes a blower 37 connected to the main air pipeline. The main air pipeline is equipped with a shut-off valve 38 to regulate the air volume and a valve to control air supply. When the influent turbidity is high, the micro-nano aeration device 35 is shut off, and the tubular aeration is activated to increase the air scrubbing effect on the membrane and reduce membrane fouling. The automatic dosing system includes coagulant dosing, chemical cleaning agent dosing, and disinfectant dosing, each connected to a pipeline mixer via a metering pump to ensure thorough mixing of the agents. When the influent turbidity exceeds the limit set by the automatic control system, the coagulant metering pump automatically activates, promoting the flocculation and sedimentation of particulate matter in the influent.Chemical cleaning is divided into maintenance cleaning and restorative cleaning, both sharing a single dosing tank. The combination of these two methods ensures effective membrane cleaning. The permeate pipeline is designed with an automatic disinfectant dosing system to guarantee permeate water quality. The permeate pipeline operates in two modes: when the incoming water turbidity is low, a siphon permeate mode is activated; when the incoming water turbidity is high and reaches the automatic control limit, a pump-suction permeate mode is activated. The two modes can automatically switch according to water quality, improving the system's anti-fouling performance, extending equipment lifespan, and reducing energy consumption. The permeate pipeline has two destinations: backwash tank 20 and permeate tank 17. Backwash tank 20 is replenished at fixed intervals, and the replenishment sequence for permeate and backwash tank 20 can be programmed for automatic switching.

[0035] In this embodiment, the water supply system is designed with an inlet water pump, namely system inlet pump 1. After the inlet pump, an electromagnetic flowmeter 2 is designed on the inlet pipeline to monitor changes in the inlet water flow rate. An online turbidity meter 41 monitors changes in the turbidity of the inlet water. When the turbidity of the inlet water is low, the fifth automatic valve 34 is opened, and the inlet water directly enters the micro-nano aeration device 35. The blower 37 supplies air to the micro-nano aeration device 35, and the effluent is a water flow containing abundant micro-nano bubbles, which flows directly out from the tubular aeration port in the membrane tank 6. The effects of micro-nano bubbles on the membrane fibers include shear force, enhanced gas-liquid interface mass transfer, improved mixing and flow pattern, and physical cleaning assistance. This can delay membrane fouling, thereby extending the cleaning cycle and reducing chemical consumption. The blower 37 air supply pipeline is designed with a shut-off valve to regulate the air volume and switch valves to change the aeration mode. The product water pipeline is designed with an automatic product water valve before the product water pump 10, and the first automatic valve 9 is designed on the bypass pump pipeline, enabling two product water modes: pump product water and siphon product water, which can be automatically switched. The permeate pipeline is designed with a permeate diaphragm valve 11 to regulate the flow rate. The system can monitor the flow rate using an electromagnetic flowmeter. Disinfectant is added to the permeate pipeline, mixed thoroughly in the pipeline mixer, and then enters the permeate tank 17. The system permeate is switched to either the permeate tank 17 or the backwash tank 20 via the second automatic valve 16 and the third automatic valve 19. The system backwashes by reverse flushing water from the membrane module permeate outlet using the backwash pump 22. During the backwashing process, cleaning agents can be added to the second pipeline mixer 24 via the first metering pump 27, or only water backwashing can be performed. The system's maintenance cleaning involves periodically adding a certain concentration of sodium hypochlorite cleaning agent to the membrane tank 6 via the second metering pump 30 for circulating cleaning.

[0036] When the turbidity of the incoming water is low, the water enters the system through the system inlet pump 1. When the online turbidity meter 41 detects the incoming water reaching the lowest turbidity level, the automatic valve 4 of the system inlet pipeline closes, and the fifth automatic valve 34 opens, allowing the incoming water to enter the micro-nano aeration device 35. The third manual valve 39 opens while the fourth manual valve 40 closes, allowing air from the blower 37 to flow into the micro-nano aeration device 35. The second manual valve 36 opens, and water containing micro-nano bubbles flows through the aeration pipe in the membrane module into the membrane tank 6. The membrane tank 6 is equipped with a level gauge 7. When a high level alarm is triggered, the system inlet pump 1 shuts off, stopping the water intake.

[0037] The permeate pipeline switches to siphon permeate mode. First, open the sixth automatic valve 8, start the permeate pump 10 and run it for 2-5 minutes, then close it. Next, close the sixth automatic valve 8. Then, open the first automatic valve 9 to enter siphon permeate mode. The permeate diaphragm valve 11 adjusts the flow rate to the target permeate volume. Disinfectant is pumped into the first pipeline mixer 15 via the metering pump. The second automatic valve 16 is opened, and the third automatic valve 19 is closed, directing the permeate to the permeate tank 17. When the level gauge 18 in the permeate tank 17 alarms for a high level, the first automatic valve 9 is closed. After a certain period of permeate production within one cycle, water is added to the backwash tank 20. The second automatic valve 16 is closed, the third automatic valve 19 is opened, and the metering pump is turned off, ceasing disinfectant addition. When the first level gauge 21 in the replenishment tank alarms for a high level, the first automatic valve 9 is closed, the system inlet pump 1 is turned off, and the blower 37 is turned off, stopping both inlet and permeate water production. Automatic valve 28 (fourth automatic) and manual valve 33 (first manual) are opened, followed by backwash pump 22 starting for water backwashing. Air backwashing is not required during this process. After backwashing, membrane tank 6 discharges sludge. Automatic valve 8 (sixth automatic) opens, discharging a certain amount of sludge-water mixture from membrane tank 6 outside the system. Maintenance cleaning is performed after 5-7 days of system operation. During backwashing, first dosing pump 27 is opened to add cleaning agent to the backwash water, completing the maintenance cleaning. Restorative cleaning is performed approximately every 3-6 months. Second dosing pump 30 is opened to add a certain concentration of chemical cleaning agent to membrane tank 6. Diaphragm valve 32 and circulating cleaning pump 31 are opened, allowing the chemical cleaning agent to circulate within membrane tank 6.

[0038] When the incoming water has high turbidity, it enters the system through the system inlet pump 1. When the online turbidity meter 41 detects the bottom turbidity of the incoming water, the fifth automatic valve 34 closes and the system inlet pipeline automatic valve 4 opens. The blower 37 is turned on, the shut-off valve 38 and the fourth manual valve 40 are opened, and the second manual valve 36 and the third manual valve 39 are closed. Intermittent aeration is performed during filtration, using ordinary tubular aeration. The membrane tank 6 is equipped with a level gauge 7. When the level is high, the system inlet pump 1 is turned off. The permeate pipeline switches to the power pump suction permeate mode. The permeate end first opens the sixth automatic valve 8, closes the first automatic valve 9, and then turns on the permeate pump 10. The flow rate is adjusted to the target permeate volume using the permeate diaphragm valve 11. The disinfectant is pumped into the first pipeline mixer 15 through the metering pump, the second automatic valve 16 is opened, the third automatic valve 19 is closed, and the metering pump is turned off, ceasing disinfectant addition. When the product water tank level gauge 18 in product water tank 17 alarms with a high level, product water pump 10 stops operating. After producing water for a certain period within a cycle, water is added to backwash water tank 20, the second automatic valve 16 is closed, and the third automatic valve 19 is opened. When the first level gauge 21 alarms with a high level, product water pump 10 and system inlet pump 1 are shut down, stopping water intake and production. The fourth automatic valve 28 and the first manual valve 33 are opened, and then backwash pump 22 is started to perform water backwashing. During this process, aeration is performed simultaneously to complete air-water combined backwashing. After backwashing, membrane tank 6 is sludge discharged, and the seventh automatic valve 8 is opened to discharge a certain amount of sludge-water mixture from membrane tank 6 out of the system. After the system has been running for 5-7 days, maintenance cleaning is performed. During the backwashing process, the first dosing metering pump 27 is opened to add cleaning agents to the backwash water to complete the maintenance cleaning. A restorative cleaning should be performed approximately every 3-6 months. The second dosing pump 30 is turned on, and a certain concentration of chemical cleaning agent is added to the membrane tank 6. The diaphragm valve 32 and the circulating cleaning pump 31 are then opened, and the chemical cleaning agent circulates and cleans the membrane tank 6.

[0039] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: (1) This utility model adopts the mainstream process of ultrafiltration + sodium hypochlorite disinfection, with coagulation sedimentation and micro-nano aeration system as auxiliary. The ultrafiltration membrane is a hollow fiber membrane, which has the characteristics of strong anti-fouling ability, long service life and excellent effluent quality. The system's multiple modules automatically switch according to the influent conditions, which improves the system's anti-shock performance and ensures stable system operation and water quality; (2) The equipment in the system is highly integrated and occupies a small area. The energy-saving water purification equipment provided by this utility model is highly integrated inside the container, which is convenient to transport and can respond quickly; (3) The degree of automation is high. The system is automatically controlled, and there is no need for frequent manual operation. It is easy to maintain and can realize remote monitoring of operation.

[0040] (4) Low system operating cost. This utility model provides an energy-saving integrated ultrafiltration water purification system. The system operation is combined with low-volume micro-nano aeration equipment, which improves the membrane's anti-fouling performance and greatly reduces the frequency of chemical cleaning processes. In addition, the siphon water production mode reduces the pump's operating energy consumption without affecting normal water production, thus comprehensively reducing the system's operating cost.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy-saving integrated ultrafiltration water purification system, characterized in that, include: The membrane tank is equipped with an ultrafiltration membrane module and a membrane tank level gauge. The membrane tank is connected to a water supply system and a sludge removal system. The ultrafiltration membrane module is connected to an aeration system, a product water system, and a backwashing system. A dosing system is connected to the membrane tank, the water supply system, the product water system, and the backwashing system. The water production system includes a first manual valve, one end of which is connected to an ultrafiltration membrane module, and the other end is connected to a sixth automatic valve. The sixth automatic valve is connected to a water production pump. The water production pump, the sixth automatic valve, and the first automatic valve are connected in parallel. The water production pump is connected to a diaphragm valve. The diaphragm valve is connected to a first electromagnetic flowmeter. The first electromagnetic flowmeter is connected to a first pipeline mixer. The first pipeline mixer is connected to a second automatic valve. The second automatic valve is connected to a water production tank. The water production tank is equipped with a water production tank level gauge.

2. The energy-saving integrated ultrafiltration water purification system as described in claim 1, characterized in that, The water supply system includes a system inlet pump, which is connected to an electromagnetic flow meter in the inlet pipeline. The electromagnetic flow meter in the inlet pipeline is connected to an online turbidity meter. The online turbidity meter is connected to a mixer in the coagulant dosing pipeline. The mixer in the coagulant dosing pipeline is connected to an automatic valve in the system inlet pipeline. The automatic valve in the system inlet pipeline is connected to a membrane tank.

3. The energy-saving integrated ultrafiltration water purification system as described in claim 1, characterized in that, The backwashing system includes a third automatic valve, one end of which is connected to the product water system and the other end to the backwash water tank. The backwash water tank is equipped with a first level gauge. The backwash water tank is connected to a backwash pump, which is connected to a second electromagnetic flow meter. The second electromagnetic flow meter is connected to a second pipeline mixer, which is connected to a fourth automatic valve. The fourth automatic valve is connected to a pressure transmitter, which is connected to a first manual valve, which is connected to an ultrafiltration membrane module.

4. The energy-saving integrated ultrafiltration water purification system as described in claim 1, characterized in that, The aeration system includes a blower, which is connected to a shut-off valve. The shut-off valve is connected to a third manual valve and a fourth manual valve, respectively, and the third manual valve and the fourth manual valve are connected in parallel.

5. The energy-saving integrated ultrafiltration water purification system as described in claim 1, characterized in that, The dosing system includes a first dosing metering pump, a second dosing metering pump, and a third dosing metering pump. One end of the first dosing metering pump is connected to a second pipeline mixer, and the other end is connected to a first dosing storage tank. One end of the third dosing metering pump is connected to a coagulant dosing pipeline mixer, and the other end is connected to a second dosing storage tank. One end of the second dosing metering pump is connected to a membrane tank, and the other end is connected to the first dosing storage tank. A second level gauge is installed on the first dosing storage tank.

6. The energy-saving integrated ultrafiltration water purification system as described in claim 1, characterized in that, The sludge removal system is connected to a sludge removal pipe at the bottom of the membrane tank, and the sludge removal pipe is used to periodically remove sludge through a seventh automatic valve.

7. The energy-saving integrated ultrafiltration water purification system as described in claim 4, characterized in that, The third manual valve is connected to the micro-nano aeration device, which is also connected to the second manual valve. The second manual valve is connected to the ultrafiltration membrane module. The second manual valve is connected in parallel with the third and fourth manual valves. The micro-nano aeration device is connected to the fifth automatic valve, which is connected to the water supply system.

8. The energy-saving integrated ultrafiltration water purification system as described in claim 1, characterized in that, The lower end of the membrane tank is connected to a diaphragm valve, the diaphragm valve is connected to a circulating cleaning pump, and the circulating cleaning pump is connected to the product water system.

9. The energy-saving integrated ultrafiltration water purification system as described in claim 1, characterized in that, It also includes a disinfectant solution storage tank, which is equipped with a drug storage tank level gauge, and the disinfectant solution storage tank is connected to the first pipeline mixer through a dosing device.

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